Navratil Tomas
CHIEF DEVELOPMENT OFFICER
Navratil Tomas has filed 21 SEC Form 4 filings (50 transaction rows) across 1 company, with disclosures dating back to 2025. 18 of those filings fall inside the rolling window. Most recent filing: Oct 7, 2026.
On the most recent filing, Navratil Tomas is listed as CHIEF DEVELOPMENT OFFICER at GLAUKOS Corp. Inside the rolling window, Navratil Tomas reported no open-market purchases and 8 open-market sales totaling $3.9M in GKOS. The largest disclosed transaction in the window is a sale of 13,744 GKOS shares on Aug 28, 2026, worth $2.5M.
Companies traded
Other insiders at GKOS
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$3.9M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 1,527 | $251K | Oct 7 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 1,615 | $249K | Sep 28 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 1,457 | $243K | Sep 18 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 13,744 | $2.5M | Sep 1 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 716 | $100K | Jul 9 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 1,537 | $201K | Jun 18 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 2,093 | $246K | Apr 14 | SEC ↗ | |
| GKOS | CHIEF DEVELOPMENT OFFICER | Sale | 1,031 | $101K | Mar 19 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Sep 22, 2025 | GKOS | Sale | $23K |
| Sep 22, 2025 | GKOS | Sale | $18K |
| Sep 22, 2025 | GKOS | Sale | $2K |
| Sep 11, 2025 | GKOS | Sale | $173K |
| Sep 11, 2025 | GKOS | Sale | $281K |
Frequently asked questions
How many SEC Form 4 filings has Navratil Tomas made?
Navratil Tomas has filed 21 SEC Form 4 filings (50 transaction rows) across 1 company since 2025.
Which companies does Navratil Tomas trade?
Navratil Tomas has filed SEC Form 4 disclosures for 1 company, including GKOS.
When was Navratil Tomas's most recent SEC Form 4 filing?
Navratil Tomas's most recent SEC Form 4 filing on Tracefour is dated Oct 7, 2026.
What is Navratil Tomas's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Navratil Tomas is listed as CHIEF DEVELOPMENT OFFICER.
What is Navratil Tomas's total buy and sell value in the current window?
Inside the rolling retention window, Navratil Tomas bought $0 and sold $3.9M based on SEC Form 4 filings.
What was Navratil Tomas's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 13,744 GKOS shares on 2026-08-28, worth $2.5M, per SEC Form 4 filings.